Can't install - composer error

[pablorq]

Hi!

I've added "stevebauman/inventory" : "1.7.*" to composer.json file, but when I run 'composer update' I get the following:

inventory-master>composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- The requested package stevebauman/inventory No version set (parsed as 1.0.0) is satisfiable by stevebauman/inventory[No version set (parsed as 1.0.0)] but these conflict with your requirements or minimum-stability.

Tryed also with "stevebauman/inventory" : "dev-master".

Added at:
"require": {
"php": ">=5.4.0",
"illuminate/database": "5.",
"illuminate/support": "5.",
"baum/baum": "1.1.*",
"stevebauman/inventory" : "dev-master"
},

Any idea to solve it?

Regards...